The Anti-Monitor is one of the most dangerous villains in DC comics, and is responsible for annihilating thousands of universes. The powerful being can absorb universes, manipulate antimatter, warp reality, manipulate and absorb energy, and create energy constructs among other abilities. He was created by Marv Wolfman, George Pérez, and Jerry Ordway to be the main antagonist in DC’s event series, Crisis on Infinite Earths. The Anti-Monitor made his first full appearance in Crisis on Infinite Earths #6 (September 1985).

The Anti-Monitor and Monitor spent millions of years battling each other, before a cataclysmic fight ended with each defeated and dormant for billions of years. Their return was unintentionally initiated by scientist Kell Mossa, aka Pariah, who wanted to view the beginning of creation. The revived Anti-Monitor learned of Pariah’s universe and destroyed it with waves of antimatter.

His next move was to take over Qward (a world in the Antimatter Universe) and rebuild his army by using the Thunderers and Shadow Demons. The Anti-Monitor unleashed a wave of antimatter that absorbed energy and destroyed positive matter universes, with the plan to become the ruler of the remaining realities. The Monitor and the Harbinger brought together powerful heroes to combat the villain and stop his destruction. He was finally stopped when Superman of Earth-Two punched him into a star that went supernova.

As a part of that story, Superman and Lois Lane of Earth-Two, Superboy-Prime, and Alexander Luthor Jr. (the son of Earth-Three’s Lex) escaped into another dimension. In the events of Infinite Crisis, they returned to the main universe with the hope of restoring Earth-Two. Once the Anti-Monitor’s remains were found, Luthor used them to create a multiverse-tuning tower to recreate the multiverse. But, it was destroyed while Conner Kent and Superboy-Prime fought.

Once the multiverse was recreated, the Anti-Monitor was resurrected to be the Sinestro Corps’ “Guardian of Fear.” Superboy-Prime attacked the Anti-Monitor, severely wounding him and sending his body into space. The Anti-Monitor was then imprisoned in the Black Lantern Power Battery and left on a lifeless planet. He escaped and became a reanimated Black Lantern, but was still connected to the battery. A White Lantern power ring resurrected him, allowing the Anti-Monitor to escape the battery, but Nekron banished him to the anti-matter universe.